JPH02244384A - Image data correcting system - Google Patents

Abstract

PURPOSE:To make differences between image data and vector data clear by making the peripheral part of the image data, which overlaps with the vector data, blank. CONSTITUTION:A drawing is read by a drawing reader 1 and the read drawing is held by a pattern recognition device 2 and displayed as an image at a display part 5. When correction data is subtracted as the vector data from the displayed image data, a host computer 3 finds the area where the image data and vector data overlap with each other. Then, while the vector data is subtracted from the overlap area, the image data of the periphery of the vector data is deleted. Consequently, the differences between the image data and vector data are made clear.

Description

[Detailed Description of the Invention] [Summary] The purpose of the present invention is to clarify the difference between image data and vector data with respect to an image data correction method in which correction notes are made while displaying a drawing on a display unit using computer graphics, etc. When reading a drawing with a reading device, holding the read drawing in a figure recognition device, displaying it as image data on the display unit, and drawing correction data as vector data from the displayed image data, the image data and vector Find the area where the data overlaps using the host computer,
The configuration is such that vector data is drawn for the obtained overlapping area and at the same time image data around the vector data is deleted.

[Industrial Field of Application] The present invention relates to an image data modification method that performs modification while displaying a drawing on a display unit using computer graphics, etc. More specifically, when displaying or modifying an input drawing, image data (binary ) and how to display image data and vector data and how to handle the image data.

[Prior Art 1] A blueprint of a house or the like may be displayed on a display unit as image data, and electrical wiring or gas piping may be added. In this case, most of the electrical wiring etc. are straight lines, and for the purpose of reducing memory capacity, such straight lines are expressed in the form of coordinates of starting points and ending points.

Straight line data expressed in the form of coordinates of a starting point and an ending point in this way is called vector data.

Conventionally, when adding vector data to image data, there are methods such as making the color of the image data and the color of the vector data different and overlapping them, or erasing the image data at the position where the vector data is drawn in advance and then drawing the vector data. methods etc. are used. FIG. 4 is a diagram showing a conventional display screen. The diagram shows the floor plan and electrical wiring of the house. Here, a is vector data and indicates electrical wiring. Drawings other than vector data a show image data.

[Problems to be Solved by the Invention] In the conventional image data correction method, as described above, if the image data and vector data are given the same color, it is difficult to distinguish between the two. Therefore, color coding is the only way to distinguish between image data and vector data.

The present invention has been made in view of such problems, and an object of the present invention is to provide an image data correction method that can clarify the difference between image data and vector data.

[Means for Solving the Problems] FIG. 1 is a flowchart showing the principle of the system of the present invention. The present invention reads a drawing with a drawing reading device (step 1), stores the read drawing in a figure recognition device, displays it as image data on a display section (step 2), and makes corrections to the displayed image data. When drawing data as vector data, the host computer calculates the area where the image data overlaps with the vector data (step 3), and for the overlap area that has been found, the image data surrounding the vector data is extracted at the same time as vector data is drawn. is characterized in that it deletes (step 4).

[Operation] FIG. 2 is an explanatory diagram of the operation of the present invention. (A) shows a conventional display, and (B) shows a display according to the present invention. According to (a), in the case of conventional display, image data b
and vector data C are simply displayed in a superimposed manner. On the other hand, in the case of the present invention shown in (b), image data b around the vector data C
is erased, and a blank section d is provided. in this way,
According to the present invention, since the image data portion around the vector data is deleted and becomes a blank portion, the difference between the image data b and the vector data C can be made clear.

Specifically, an operator inputs vector data as coordinate points to a host computer, thereby deleting only the peripheral area of the image data read from the storage device where the vector data is drawn. The image data from which the peripheral portion has been deleted is written to the storage device 4 via the figure recognition device.

At the same time, coordinate point data indicating vector data is also written into the storage device.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a block diagram showing an example of a system configuration for implementing the present invention. In the figure, ■ is a drawing reading device that reads drawings such as blueprints, and 2 holds the figures read from the drawing reading device 1 and converts them into vectors.

A figure recognition device that performs processing such as recognition, 3 manages each of these devices, and is a figure recognition bag! This is a host computer that has the function of displaying and modifying the image data held in 2. As the drawing reading device 1, for example, a CCD or the like is used.

4 is a storage device connected to the figure recognition device 2 and stores image data, vector data, etc.; 5 is a host computer 3;
A display section 6 displays image data, vector data, etc., and a keyboard 6 is connected to the host computer 3 through which the operator inputs various commands when creating vector data. As the storage device 4, for example, a disk device is used, and as the display unit 5, for example, a CRT is used. The operation of the circuit configured as described above will be explained as follows.

Drawing information as shown in FIG. 4 is read by the drawing reading device 1 and sent to the figure recognition device 2.

When the drawing recognition device 2 receives the read data from the drawing reading device H1, it holds the read figure, performs processes such as vectorization and recognition, and stores the results in the storage device f4. At the same time, the image data stored in the storage device f4 is read out by the host computer 3 and displayed on the display section 5.

Here, it is assumed that the operator views the image data displayed on the display unit 5 and needs to make a correction. It is assumed that an operator draws vector data from the keyboard 6 or from a coordinate human power device (not shown) attached to the keyboard 6, such as a mouse. When the operator indicates the start and end point positions, the host computer 3 calculates the positions of the start and end points and sends them to the figure recognition device 2. The figure recognition device 2 stores the coordinates of the starting point and the ending point as vector data in the storage device 4, and displays the vector between the two points on the display section 5.

Further, when displaying the vector data overlapping the image data, the host computer 3 finds an area where the image data and the vector data overlap, and deletes the image data around the vector data. At the same time, the data in the image data area stored in the storage device 4 is made to be a white pixel. As a result, the second
This results in an easy-to-read display in which the image data around the vector data is blank, as shown in Figure (b).

[Effects of the Invention] As described above in detail, according to the present invention, the difference between image data and vector data can be made clear by blanking out the peripheral portion of image data that overlaps with vector data. It is possible to provide an image data modification method that can perform the following steps.

[Brief explanation of drawings]

Fig. 1 is a flowchart showing the principle of the method of the present invention, Fig. 2 is an explanatory diagram of the operation of the present invention, Fig. 3 is a block diagram showing an example of a system configuration implementing the present invention, and Fig. 4 is a diagram showing a conventional display screen. FIG. In FIG. 3, 1 is a drawing reading device, 2 is a graphic recognition device, 3 is a host computer, 4 is a graphic storage device, 5 is a display unit, and 6 is a keyboard. Method of the present invention ■ Flow chart showing the principle Figure 1 Vector data Figure showing the conventional Φ display screen Section 4

Claims (1)

[Claims] A drawing is read by a drawing reading device (step 1), the read drawing is held by a figure recognition device, and is displayed as image data on a display unit (step 2), and the displayed image data is When drawing the corrected data as vector data, the host computer calculates the area where the image data and vector data overlap (step 3). An image data modification method characterized in that image data is deleted (step 4).